There is a thread http://www.fistful-of-leone.com/forums/index.php?topic=2360.0 that shows some stills from For a Few Dollars More and GBU where someone forgot that the sewn-up bullet holes from Fistful were in view; typically, the poncho was rotated for a scene so they wouldn't be visible, but sometimes someone forgot. Even in Fistful - since shot out of sequence like most films - has a few instances of this.

But in westerns, so far as I can remember, he always shoots at the person and never at the horse.

In The Magnificent Seven, after killing a bandit riding away from long distance, after Horst Bucholz says that was the best shot he'd ever seen, James Coburn says it was the worst shot - that he was actually aiming at the bandit's horse. So Coburn was smart enough to aim for the horse.

I saw all these in theaters as first run, except Once/America later in 1985 as it was put back into the Leone timing. That was the only one that had intermission as first run. But I did see GBU years later and there was an intermission just after Tuco cuts the chains and jumps on the train.

I liked that Van Cleef was first face in the film, that he played a harmonica, and never said a single word.

I feel Cooper was way too old for the part, and too old for Grace Kelly.

I didn't like Katy Jurado.

We were told in film class - might be true - that pre-screenings of this film were a flop; then the clock stuff and the music/lyrics beefed up. I liked the build up of the music where it ends with the train whistle.

Waiting a while, or a day, for the train was likely commonplace back then. Nowadays folks get peeved when a flight is 10 minutes late.

I'd say that at least 5 of the additional scenes are worthwhile. Most notable: the Confederate outpost, Tuco getting information that Mission San Antonio was only a few miles away, and he might be able to get help there, leaving the mission, all the dead bodies on the way, Tuco telling Blondie that they have a long way to go, will need to cross enemy lines several times.